Linotype-mold



E. L. HOLMES. LINOTYPE MOLD.

APPLICATION FILED AUG-13, 1919.

Patented Apr. 20, 1920.

INVENTOR. fawaraAfio/mes W M ATTORNEY UNITED STATES PATENT OFFICE.

EDWARD I]. HOLMES, OF SEATTLE, WASHINGTON, ASSIGNOR TO PRINTING TRADES MANUFACTURING COMPANY, OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

LINOTYPE-MOLD.

Specification of Letters Patent.

Application filed August 13, 1919. Serial No. 317,179.

To all whom it may concern:

Be it known that I, EDWARD L. HOLMES, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Linotype-Molds, of which the following is a specification.

This invention relates to linotype molds in which typebars or slugs are cast.

In the operation of a linotype machine, the alternate heating and cooling of the mold effects the expansion and contraction thereof which produces local or unequal tensile and compressive strains which tend to warp the mold and render it unsuitable for good work.

The object of the present invention is the improvement of linotype molds for the purpose of obviating the above mentioned warping and other difliculties.

The invention consists in the novel construction and adaptation of devices as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a front elevational view of a linotype-mold embodying my invention. Fig. 2 is a rear elevation of the same. Fig. 3 is a fragmentary plan view thereof. Fig. 4 is a sectional view through l-4 of Figs. 1 and 2.

In said drawings, the reference numeral 5 designates the body member and 6 the cap member of a mold which are retained in spaced relations by means of liners 7 to afford the slot 8 in which a linotype or slug is cast. Adjacent to the slot8, said body is formed with a bar element 5 of a width equal to the depth of the slugs, and below such bar portion the body is provided with a depending flange 5 provided with spaced holes 9 for the reception of bolts, not shown, by which the mold body is rigidly secured to the mold wheel or disk of a linotype machine, as usual.

The cap member 6, in like manner, is provided with a bar element 6 which is formed integral with an arcuate rib element 6 The bar elements 5 and 6 constitute the lower and upper walls, respectively, of the mold slot 8.

The mold as above described is similar to those in general use on linotype machines.

According to the present invention, a recess 10 is provided in the underside of the body bar element 5 at the rear and at about the midlength of the member.

, A recess 11 is in like manner provided in the rear and centrally of the cap rib element 5 and extending, desirably, to within a short distance of the slot 8. The recesses 10 and 11 are of lengths of one-third, approximately, that of the mold. The function of said recesses is to provide cavities for the admission of air to facilitate the cooling of the mold subsequent to the slug casting operation.

In carrying out the invention the flange portion 5 of the body and the rib portion 6 of the cap are respectively provided with slits l3 and 12 extending from the bar portions 5 and 6 at right angles, preferably, to the mold slot 8.

As shown, the slits 12 of the cap rib are located in proximity to the ends of the recess 11 thereby dividing the rib into a recessed central portion ll directly above the part of mold slot which becomes extremely hot when the molten metal is forced thereinto, and two wing portions 15 of a substantially triangular shape longitudinally of the cap. The slits 13 of the body member 5 are located intermediate the boltholes 9.

The body flange is thus divided into a plurality of portions 16, each of which is arranged to be secured to the mold disk by a single bolt passing through the respective holes 9 so that the material in each portion may contract or expand independently of the other portions.

By reason of the slitting of the respective flange and rib elements the associated bar elements 5 and 6 may extend or contract without becoming warped or bent as would occur if constrained unslitted flange or rib elements such as hitherto used in linotype molds.

What I claim, is-

1. A slotted linotype mold consisting of complementary body and cap members provided with transversely arranged slits extending from the lower and upper edges respectively of said members into the proximity of the lower and upper walls of the mold-slot.

2. A linotype mold having cavities in its body and cap members, said cap members slitted at their lower and upper sides respectively to afford portions which are expansible by heat individually for the purpose of obviating any warping of the mold members when subjected to varying temperatures.

3-; linotype mold having body and cap members which are slitted from their lower and upper sides, respectively, and at approximately right angles to the mold slot' to afford longitudinally spaced portions in each of said members, thereby permitting expansion and contraction of the various portions without Warping the respective members. 7 i t. In a linotype mold, the combination with the body member, of a cap. member having bar and rib elements, said rib element consisting of a plurality of spaced portions connected together through the 7 medium of the bar element" 5; In a. linotype mold, a body member having a bar'element and a flange element divided by slits to aiiord' spaced portions depending from said bar element, each or" said flange portions being provided with ahole to receive a bolt for securing said member to a mold-disk.

vided with bar elements which constitute disposed at substantially the midrlen-gt'h of the mold. V

7. In a linotype mold the combination with the body member having a bar element and a plurality of depending flange portions arranged in spaced relations with respect to each other,fof'a cap member having a bar element and a rib element extending up wardly therefrom, said rib element being divided by slits to provide a central portion and two wing portions, said central portion being recessed to afford a cavity for the admission of cooling air thereinto.

Signed at Seattle, Washington, this 31st 7 day of July, EDWARDL. HOLMES.

Witnesses:

PIERRE BARNES, ELIZABETH JOHNSON. 

